update readme file, fix some little things

.env.example

@@ -0,0 +1,10 @@
+GATE_ENABLED=true
+GATE_URL="https://gate.example.com/"
+GATE_CLIENT_ID=3
+GATE_CLIENT_SECRET=client_secret
+GATE_KEY=
+GATE_REDIRECT_URL="http://localhost/auth/callback"
+GATE_AUTHORIZE_URL="http://localhost:8000/oauth/authorize"
+GATE_TOKEN_URL="http://localhost:8000/oauth/token"
+GATE_USER_URL="http://localhost:8000/api/user"
+

README.md

@@ -17,8 +17,28 @@ composer require looxis/gate
 
 ## Usage
 
+
+To register your provider, add it to the array into `config/app.php` file:
+```php
+'providers' => [
+    // Other Service Providers
+
+     \Looxis\Gate\GateServiceProvider::class
+],
+```
+
+
+Add some properties to your `.env` file (see .env.example)
+```php
+GATE_ENABLED=true
+GATE_URL="https://gate.example.com/"
+GATE_CLIENT_ID=3
+GATE_CLIENT_SECRET=client_secret
+```
+
+Also you can publish the config file with this artisan command:
 ``` php
-// Usage description here
+php artisan vendor:publish --tag=gate-config
 ```
 
 ### Testing

src/GateServiceProvider.php

@@ -4,6 +4,7 @@
 
 use Illuminate\Support\ServiceProvider;
 use Laravel\Socialite\Contracts\Factory;
+use Laravel\Socialite\Facades\Socialite;
 
 
 class GateServiceProvider extends ServiceProvider
@@ -56,11 +57,15 @@ public function register()
         $this->mergeConfigFrom(__DIR__.'/../config/gate.php', 'gate');
         // Register the main class to use with the facade
 
+        $this->app->bind('gate', function () {
+            return Socialite::driver('gate');
+        });
+
         $this->app->resolving(Factory::class, function ($socialite) {
             $socialite->extend(
                 'gate',
                 function ($app) use ($socialite) {
-                    $config = config_path('gate.php');
+                    $config = config('gate');
                     return $socialite->buildProvider(GateProvider::class, $config);
                 }
             );